!!! Overview
The [{$pagename}] is applied to <add> events and serves to disallow (veto) the creation of a new object if an already existing object was not found using the Matching Policy. The Create Policy is within both the: 
* [Subscriber Flow] the [{$pagename}] uses the [Policy Set Interval Values] of 8
* [Publisher Flow] the [{$pagename}] uses the [Policy Set Interval Values] of 9
and each channel will usually have different Create Policies.

The [{$pagename}] is often used to examine the attributes available for the new object from the source event and may veto the creation of the new object is one or more required attributes is missing.

The [{$pagename}] may also used to supply default values for attributes to be used in the creation of the new object.

The [{$pagename}] is executed, assuming no Matches were found, after the [Matching Policy Set] and before the [Placement Policy Set]. 

Note that the [{$pagename}] will not be executed if the [Matching Policy Set] found a matching object in the channel destination.

The XDS Document only reaches [{$pagename}] if the Engine has determined that the entry does __NOT__ exist in [EDirectory] or the Connected Application. This implies, no matches were found and no Association exists.

The [{$pagename}] define the conditions that must be met to create a new object. The absence of a Creation policy implies that the object can be created.

For example, you create a new user in the Identity Vault, but you give the new User object only a name and ID. This creation is mirrored in the eDirectory tree, but the addition is not immediately reflected in applications connected to the Identity Vault because you have a [{$pagename}] specifying that only User objects with a more complete definition are allowed.

A [{$pagename}] can be the same for both the [Subscriber Channel] and the [Publisher Channel], or it can be different.

[Template Objects] can be specified for use in the creation process when the object is being created in eDirectory.

[{$pagename}] are commonly used to:
* Veto creation of objects that don’t qualify, possibly because of to a missing attribute.
* Provide default attribute values.
* Provide a default password.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]